2005ApJ...627L.129S

Query : 2005ApJ...627L.129S

2005ApJ...627L.129S - Astrophys. J., 627, L129-L132 (2005/July-2)

The gamma-ray giant flare from SGR 1806-20: evidence of crustal cracking via initial timescales.

SCHWARTZ S.J., ZANE S., WILSON R.J., PIJPERS F.P., MOORE D.R., KATARIA D.O., HORBURY T.S., FAZAKERLEY A.N. and CARGILL P.J.

Abstract (from CDS):

Soft γ-ray repeaters (SGRs) are neutron stars that emit short (≲1 s) and energetic (≲10⁴² ergs/s) bursts of soft γ-rays. Only four of them are currently known. Occasionally, SGRs have been observed to emit much more energetic ``giant flares'' (∼10⁴⁴-10⁴⁵ ergs/s). These are exceptional and rare events. We report here on serendipitous observations of the intense γ-ray flare from SGR 1806-20 that occurred on 2004 December 27. Unique data from the Cluster and Double Star TC-2 satellites, designed to study the Earth's magnetosphere, provide the first observational evidence of three separate timescales within the early (first 100 ms) phases of this class of events. These observations reveal that in addition to the initial very steep (<0.25 ms) X-ray onset, there is first a 4.9 ms exponential rise timescale followed by a continued exponential rise in intensity on a timescale of 70 ms. These three timescales are a prominent feature of current theoretical models, including the timescale (several milliseconds) for fracture propagation in the crust of the neutron star.

Abstract Copyright: ∼

Journal keyword(s): Gamma Rays: Observations - Stars: Individual: Alphanumeric: SGR 1806-20 - Stars: Magnetic Fields - Stars: Neutron - X-Rays: Stars

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	PSR J1808-2024	Psr	18 08 39.32	-20 24 40.1						~	1316	2

Query : 2005ApJ...627L.129S

Basic data :

PSR J1808-2024 -- Pulsar
Other object types:	`X (2022MNRAS,AX,...)`, `gB (GBS,GRB,...)`, `Psr (2012ApJ,PSR)`, `gam (INTEGRAL1,INTREF)`, `Rad (MITG)`, `IR ([FMC99])`
ICRS coord. (ep=J2000) :	`18 08 39.32 -20 24 40.1 (X-ray) [ 100 100 90 ] C 2012ApJ...756...27L`
FK4 coord. (ep=B1950 eq=1950) :	`18 05 40.68 -20 25 11.4 [ 100 100 90 ]`
Gal coord. (ep=J2000) :	`009.99584 -00.24194 [ 100 100 90 ]`

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`PSR J1808-2024`	`GRB 041227`	`KONUS 07.01.79`	`SWIFT J1808.6-2024`
`AX 1805.7-2025`	`HETE Trigger 3800`	`MITG J1808-2024`	`2XMM J180839.2-202439`
`CXOU J180839.3-202439`	`HETE Trigger 3801`	`NAME Sgr 1806-20`	`[ABH87] 25`
`GBS 1806-20`	`HETE Trigger 1566`	`PBC J1808.5-2025`	`[FMC99] O`
`GRB 970912`	`INTEGRAL1 84`	`RX J1808.6-2024`	`[KRL2007b] 305`
`GRB 790107`	`INTREF 882`	`SWIFT J1808.7-2024`	`EQ 1805.7-2025`

References (1316 between 1850 and 2026) (Total 1316)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : PSR J1808-2024

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MITG J1808-2024

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